Mail Blaze MCP by usefulapi
Manage Mail Blaze lists, subscribers, templates, campaigns and reports; send transactional email.
Connect it
Settings → Connectors → Add custom connector
URL: https://mailblaze.usefulapi.io/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://mailblaze.usefulapi.io/mcp{
"mcpServers": {
"mailblaze": {
"url": "https://mailblaze.usefulapi.io/mcp"
}
}
}claude mcp add --transport http mailblaze https://mailblaze.usefulapi.io/mcp{
"servers": {
"mailblaze": {
"type": "http",
"url": "https://mailblaze.usefulapi.io/mcp"
}
}
}26 tools, pulled live
mailblaze_list_listsread-onlyList the account's mailing lists (name, uid, subscriber counts, defaults). Use the list uid in the other tools. Paged: page + per_page.
mailblaze_get_listread-onlyGet one mailing list by its uid: general settings, default sender, company details and counts.
mailblaze_list_list_fieldsread-onlyList the fields of a mailing list (label, tag, type, required). The tags (EMAIL, FNAME, LNAME, custom ones) are the keys used when adding or updating subscribers.
mailblaze_list_segmentsread-onlyList the segments defined on a mailing list (uid, name). A segment uid can be used when creating a campaign.
mailblaze_list_subscribersread-onlyList the subscribers of a mailing list (sets of 10 per page; use page to go on). Contains personal data (emails, names).
mailblaze_get_subscriberread-onlyGet one subscriber of a list by subscriber uid (status, fields, dates).
mailblaze_find_subscriber_by_emailread-onlyLook up a subscriber in one list by email address. Returns the subscriber (with its uid) or a not-found error.
mailblaze_add_subscribercan modifyWRITE, MAY SEND A CONFIRMATION EMAIL: add one subscriber to a mailing list. Depending on the list's settings Mail Blaze may send the person a confirmation (double opt-in) email. Only add people who agreed to receive your email. An email that is already on the list answers with a conflict error.
mailblaze_add_subscribers_bulkcan modifyWRITE, MAY SEND CONFIRMATION EMAILS: add up to 100 subscribers to a mailing list in one request; an email already on the list is updated instead. Depending on the list's settings Mail Blaze may send confirmation emails. Only add people who agreed to receive your email.
mailblaze_update_subscribercan modifyWRITE: update a subscriber's name or custom fields. Pass the subscriber's current email (Mail Blaze requires it) plus only the values to change. Does not change subscription status.
mailblaze_unsubscribe_subscribercan modifyWRITE: set a subscriber's status to unsubscribed so they receive no more campaigns from this list. By default Mail Blaze also adds the address to the account's local blacklist. Do this only when the person asked to stop (or a data-protection request requires it). The subscriber record is kept.
mailblaze_resubscribe_subscribercan modifyWRITE: set a previously unsubscribed subscriber back to subscribed so campaigns reach them again. Only do this when the person asked to be re-added (consent).
mailblaze_list_templatesread-onlyList the account's email templates (uid, name). A template uid is needed to create a campaign.
mailblaze_get_templateread-onlyGet one email template by uid (name and content).
mailblaze_create_templateWRITE: create an email template from HTML (the tool base64-encodes it). Mail Blaze requires the HTML to contain an unsubscribe link. Sends nothing.
mailblaze_list_campaignsread-onlyList the account's email campaigns (uid, name, status, dates). Use the campaign uid for details and reports.
mailblaze_get_campaignread-onlyGet one campaign by uid: sender, subject, list, template, status and schedule.
mailblaze_create_campaigncan modifyWRITE, SENDS EMAIL TO PEOPLE: create a campaign for a mailing list (or one of its segments) from an existing template and schedule it for send_at. Once it goes out it reaches every subscriber of the list or segment, may use sending credit and cannot be recalled. Confirm the list, segment, subject, template and send time with the user before calling. Needs a template uid (mailblaze_list_templates)
mailblaze_get_campaign_summariesread-onlyBulk report summary (sent, opens, clicks, bounces, unsubscribes) for up to 50 campaigns in one call. Read-only (it is a POST in the API only because of the id list).
mailblaze_get_campaign_inbox_breakdownread-onlyInbox-provider breakdown (e.g. Gmail, Outlook, Yahoo) of a campaign's delivery.
mailblaze_list_campaign_eventsread-onlyList the individual events of a campaign by kind: opens, clicks, bounces or unsubscribes. Cursor-paged: pass the reply's next_cursor back until it is null. For very large campaigns Mail Blaze answers 202 with a job_id; check it with mailblaze_get_report_job.
mailblaze_get_subscriber_activityread-onlyEmail activity (sends, opens, clicks, bounces) of one subscriber by email address, optionally limited to one list. Cursor-paged.
mailblaze_get_report_jobread-onlyStatus (and result when finished) of an asynchronous report job, as returned in a 202 reply with a job_id.
mailblaze_list_transactional_emailsread-onlyList the transactional emails sent through the account (uid, recipient, subject, status). Paged.
mailblaze_get_transactional_emailread-onlyGet one transactional email by uid: recipient, subject, status and timestamps.
mailblaze_send_transactional_emailcan modifyWRITE, SENDS ONE EMAIL NOW: send a single one-to-one email to one recipient through Mail Blaze. It leaves immediately, uses sending credit and cannot be recalled. Give either html (the body) or template_id (a transactional template, with merge_tags covering every tag in it), not both. Confirm the recipient and content with the user before calling. Not for bulk or marketing mail; use a campaign for
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